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  Electric Motors, Engines & Accessories > Engines Glow Fuel > Engines R/C Glow Fuel Car 2-Stroke - .0 -.15 Bookmark this Page

O.S. - OSMG1992 OSM11685 11685 531028022201 4531028022201
Manufacturer Stock#
11685
A Closer Look at This Product
  Tech Notes

Accessories Needed

Replacement & Optional Parts

Easy RC: Engines

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O.S. 12XZ Speed Spec III Engine
 
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O.S. 12XZ Speed Spec III Engine
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Instruction Manuals: Manual 1 (2.5 MB)
Tower Catalog Page: 202

Stock Number
LXCNFN
Retail Price
699.99
Tower's Low Price
$449.99
Stock Status
In Stock
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Quantity Discount
  Special Savings When Buying in Quantities
 
Special Stock Number Units at this Price Tower's Low Price Click to Order Quantity Discount Savings
 L5CNFN02
O.S. 12XZ Speed Spec III Engine Add to Wish List
859.48  Buy Now 40.50  

Tech Notes
 
NOTES FROM OUR TECH DEPARTMENT
This is the 12XZ Speed Spec III Glow Powered Touring Car Engine
from O.S. Engines.

****** Because of the expressed racing nature of this engine, ******
****** it is NOT covered by the O.S. 2 Year Warranty ******
****** per page 8 of manual. ******

FEATURES

Redesigned head button for better performance and improved
acceleration
Tapered surface on piston with a depression that works with the head
button to maximize combustion and power
Slightly thicker cylinder liner with redesigned ports for better air/
fuel flow that boosts mid-speed torque and extends fuel mileage
Redesigned 12F2 (B) slide valve carburetor delivers sharp
acceleration and instant throttle response with easier more
reliable tuning
DLC coating on crankshaft with pressed in Tungsten weights and
ceramic rear ball bearing
Outer head sits 0.24" (6mm) lower over the crankcase decreasing the
engine's weight, lowering the CG and aiding in cooling

INCLUDES

12XZ Speed Spec III Engine, with 12F2(B) Slide Valve Carburetor,
RP6 Glow Plug, Exhaust Seal Ring, Dust Cap Set, 5.5mm Red Carb
Reducer and Instruction Manual

REQUIREMENTS

Fuel: 10-30% nitro content, 20% recommended for break-in
Exhaust System: Depending on vehicle
Air cleaner assembly, glow starter and track equipment

SPECIFICATIONS

Displacement: 0.128 cu in (2.1cc)
Bore: 0.543" (13.8mm)
Stroke: 0.55" (14.0mm)
Practical RPM Range: 5,000-44,000
Output: 1.73hp @ 35,000 RPM
Weight: 7.9oz (225g)
Height from crankcase bottom to top of cylinder head: 3.2" (82mm)
Height/crankshaft center to top of cylinder head: 2.7" (68.7mm)
Width including mounting tabs: 1.5" (39mm)
Crankcaase width below mounting tabs: 1.02" (26mm)
Width between mounting hole centers same side: 0.43" (11mm)
Width between mounting hole centers opposite side: 1.2" (31.4mm)
Mounting hole diameter: 0.12" (3mm)
Cylinder head diameter: 1.9" (49mm)
Length from end of crankshaft to front bearing: 1.2" (29.5mm)
Length from backplate to front bearing: 2.1" (52.6mm)
Length from backplate to end of crankshaft: 3.2" (82.1mm)
Crankshaft Size: 1/4-28
Carburetor Settings:
Needle Valve, 2.5 turns open from fully closed
Throttle Stop Screw, 0.5mm open
Mixture Control Valve, follow break-in procedure and turn
clockwise 15 to lean mixture or counterclockwise 15 to richen
mixture
(Make adjustments only in small increments. Refer to manual for
full break-in and carburetor adjustment instructions)

COMMENTS

Some notes on Slide Valve and Rotary Carburetors:
Rotary Carbs offer a larger response in the middle of the power
band. This works well for off-road applications when throttle
response must be varied.
Slide Valve Carbs provide greater response at the beginning and end
of the power band. This works well for on-road and racing
applications for fast take-offs and high speed.

jxs 12/31/12
ir/jxs

– If you need more information, use these O.S. resources –
Click Here: Manufacturer's Product Web Page
Email: enginesupport@hobbico.com
Web Site: http://www.osengines.com/
Phone: 217-398-8970
  Postal Address:
O.S.
3002 N. APOLLO DRIVE, SUITE #1
CHAMPAIGN, IL 61822

Click here for Units of Measure Conversion Calculators

Accessories Needed
 
COMPLETION NOTES FROM THE TECH DEPARTMENT
This is the O.S. 12XZ(P) Speed Spec III On-Road Engine. FEATURES: DLC coated, silicone filled crankshaft with tungsten weight & ceramic rear bearing, 12F2(B) slide valve carburetor REQUIRES: Fuel and track equipment, exhaust system depending on vehicle

Accessories for the O.S. 12XZ Speed Spec III Engine

Primary Accessories   Building & Field Equipment Optional Accessories
 
  Special Stock Number Product Description Parts Saver Eligible Tower's
Low Price
Click to Order Quantity Needed In Cart? Stock
Status
 LXRXC9 Tower Hobbies TOWER Power 20% Car Fuel Quart
Qty Discount Available
10.69   In Stock
Subtotal for this Group of Accessories: 10.69  

Primary Accessories   Building & Field Equipment Optional Accessories

 
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